Finding the Third Proportional to 21,072 and 30,228

Step by Step Solution

1. Step 1: Write the proportion equation
   21,072 : 30,228 = 30,228 : x
2. Step 2: Convert to fraction form
   21,072/30,228 = 30,228/x
3. Step 3: Cross multiply
   21,072x = 30,228 × 30,228
4. Step 4: Simplify right side
   21,072x = 913,731,984
5. Step 5: Solve for x
   x = 913,731,984/21,072
6. Step 6: Final answer
   x = 43,362.38